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Figure 2. Cell division is not required for cardiomyocyte differentiation. Embryos stained for phH3 expression after incubation without (A) or with HUA (B) from stage-13. (C) Percentage of phH3-positive cells in the epidermis are decreased after HUA treatment vs. untreated control (matched areas, n ≥ 3 separate embryos ± SD; *P < 0.001). Transverse sections of stage-33/34 embryos after incubation of embryos in normal media (D and D′) or media containing HUA (E and E′), Tropomyosin expression (red), phH3 (green), and DNA in nuclei (Hoechst, blue); §Myotome is also positively labelled by tropomyosin. Note: Stage-29/30 embryos after control (F and H) or HUA (G and J) incubation showing TIc (F and G) or Nkx2.10 (H and J) expressions. (K) Heart size in control or HUA-incubated embryos as measured by TIc and Nkx2.10 expression area (see Figure 4A–H for examples). Image published in: Movassagh M and Philpott A (2008) Published on behalf of the European Society of Cardiology. This image is reproduced with permission of the journal and the copyright holder. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license Gene Synonyms Species Stage(s) Tissue h3-3a.L h3.3, h3.3a, h3f3a X. laevis Throughout NF stage 29 and 30 epidermis mitotic cell tpm1.L alpha-tm, alpha-tropomyosin, CH1 X. laevis Throughout NF stage 33 and 34 myotome cardiac myocyte heart h3-3a.L h3.3, h3.3a, h3f3a X. laevis Throughout NF stage 33 and 34 heart cardiac myocyte mitotic cell myotome tnni3.L c-troponin, cardiac tropin T, cardiac troponin I, cTnI, ctnIc, cTNT, TIc, TnIc, tnnic, troponin-ic, XcTnI, XTnIc X. laevis Throughout NF stage 29 and 30 heart nkx2-6.L nkx2.6, tix, Xnkx2-10 X. laevis Throughout NF stage 29 and 30 heart Image source: Published Larger Image Printer Friendly View

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